Preprint article · Journal article
Tuning the two-dimensional electron liquid at oxide interfaces by buffer-layer-engineered redox reactions
Polar discontinuities and redox reactions provide alternative paths to create two-dimensional electron liquids (2DELs) at oxide interfaces. Herein, we report high mobility 2DELs at interfaces involving SrTiO3 (STO) achieved using polar La7/8Sr1/8MnO3 (LSMO) buffer layers to manipulate both polarities and redox reactions from disordered overlayers grown at room temperature.
Using resonant x-ray reflectometry experiments, we quantify redox reactions from oxide overlayers on STO as well as polarity induced electronic reconstruction at epitaxial LSMO/STO interfaces. The analysis reveals how these effects can be combined in a STO/LSMO/disordered film trilayer system to yield high mobility modulation doped 2DELs, where the buffer layer undergoes a partial transformation from perovskite to brownmillerite structure.
This uncovered interplay between polar discontinuities and redox reactions via buffer layers provides a new approach for the design of functional oxide interfaces.
Language: | English |
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Publisher: | American Chemical Society (ACS) |
Year: | 2017 |
Pages: | 7062-7066 |
ISSN: | 15306992 and 15306984 |
Types: | Preprint article and Journal article |
DOI: | 10.1021/acs.nanolett.7b03744 |
ORCIDs: | Chen, Yunzhong , Linderoth, Søren and Pryds, Nini |